Amino Acid Bioavailability in Healthy Elderly After Intake of an Oral Nutritional Supplement

Inclusion Criteria: * Age 65 years or older * BMI between 21 and 30 kg/m2 Exclusion Criteria: * Any condition that may interfere with the definition 'healthy elderly' according to the investigator's judgement. * Any (history of) gastrointestinal disease that interferes with GI function (e.g. inflammatory bowel disease, gastroparesis, gastrectomy). * Known allergy to milk and milk products. * Known galactosaemia. * Current or recent (within past three months) smoking. * Known or suspected Diabetes Mellitus. * Current infection or fever in the last 7 days at the discretion of the physician. * Use of antibiotics within 3 weeks of study entry. * Current use of corticosteroids or hormones. * Current use of antacids or any medication influencing gastric acid production. * Requirement for any nutritional support. * Unplanned body weight loss \> 5% in the past 3-6 months. * Adherence to any specific diet (e.g. weight loss, vegetarian). * Use of protein containing or amino acid containing nutritional supplements within one week of study entry. * Alcohol or drug abuse. * Investigator's uncertainty about the willingness or ability of the subject to comply with the protocol requirements. * Participation in any other study with investigational products concomitantly or within 4 weeks of study entry.